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THE TOP 10 SOUTHERN CALIFORNIA FAULTS

 

Fault	Probable Magnitudes	Length in Kilometers	Slip rate, millimeters per yearR	Average time between earthquakes
San Andreas	6.8-8.0	1200*	30 +/- 5	140-210
San Jacinto	6.5-7.5	230	12 +/- 5	85-250
Whittier-Elsinore	6.5-7.5	200	5 +/- 2	250-700
Imperial	6.5-7.5	50	30 +/- 5	40-60
Garlock	6.5-7.0	250	7 +/- 4	200-3000
Oakridge	7.0-7.5	90	5 +/- 1	200-700
Sierra Madre	6.5-7.5	85	4 +/- 2	200-1000
Santa Susana	6.5-7.3	40	6 +/- 1	100-300
San Cayetano	6.5-7.3	40	4.5 +/- 2	200-600
Cucamonga	6.0-7.0	25	4 +/- 2	200-1000

• These are the fastest-slipping faults, moving at a rate of at least 4 millimeters per year.  The Newport-Inglewood fault, although famous, moves less than 0.5 millimeter per year, slower than many others in Southern California.

• *550 kilometers of the San Andreas fault are in Southern California, south of Parkfield.

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